WO2024087852A1 - Amplificateur de puissance différentielle à deux étages et module d'amplification de puissance radiofréquence - Google Patents

Amplificateur de puissance différentielle à deux étages et module d'amplification de puissance radiofréquence Download PDF

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Publication number
WO2024087852A1
WO2024087852A1 PCT/CN2023/115067 CN2023115067W WO2024087852A1 WO 2024087852 A1 WO2024087852 A1 WO 2024087852A1 CN 2023115067 W CN2023115067 W CN 2023115067W WO 2024087852 A1 WO2024087852 A1 WO 2024087852A1
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WO
WIPO (PCT)
Prior art keywords
capacitor
power unit
stage
driving
final
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PCT/CN2023/115067
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English (en)
Chinese (zh)
Inventor
许靓
郭嘉帅
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深圳飞骧科技股份有限公司
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Publication of WO2024087852A1 publication Critical patent/WO2024087852A1/fr

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/56—Modifications of input or output impedances, not otherwise provided for
    • H03F1/565—Modifications of input or output impedances, not otherwise provided for using inductive elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/4508—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier

Definitions

  • the present invention relates to the technical field of signal processing, and in particular to a two-stage differential power amplifier and a radio frequency power amplifier module.
  • 5G-NR is a global 5G standard based on a new aperture design of OFDM.
  • the N77 and N79 bands are higher frequency bands than the Sub-3G bands. Therefore, they decay relatively quickly during propagation, the path loss is relatively large, and the coverage of a single carrier is limited. Therefore, in order to improve user experience and reduce the cost of base station construction, 3GPP has defined a new power standard Power Class 2 (PC2), which means that the output power of wireless terminal equipment is increased by 3dB based on the original Power Class 3 (PC3).
  • PC2 Power Class 2
  • PC3 Power Class 3
  • the reason why the circuit gain effect of the two-stage differential power amplifier is low is that the first final power unit and the second final power unit in the circuit structure of the two-stage differential power amplifier usually work in class AB, and the heterojunction bipolar transistor (Heterojunction bipolar The base-collector capacitance (Cbc) of the high-pass transistor (HBT) provides a feedback path during operation, which will cause the gain effect of the two-stage differential power amplifier to be significantly reduced as the operating frequency increases.
  • Cbc base-collector capacitance of the high-pass transistor
  • the object of the present invention is to provide a two-stage differential power amplifier and a radio frequency power amplifier module to solve the problem of low circuit gain effect of the existing two-stage differential power amplifier.
  • the present invention provides a two-stage differential power amplifier, comprising a signal input terminal, a driving stage power unit, an amplifying stage differential power unit, an output synthesis unit and a signal output terminal connected in sequence;
  • the driving stage power unit is used to amplify the single-ended signal received by the signal input end and then output it;
  • the amplifying stage differential power unit is used to receive the single-ended signal amplified by the driving stage power unit, and convert it into two differential signals and then amplify them respectively and then output them;
  • the output synthesis unit is used to synthesize the two differential signals converted and amplified by the amplifying stage differential power unit into a single-ended signal and then output it to the signal output end;
  • the amplifier stage differential power unit includes a differential unit, a first final stage power unit, a second final stage power unit, a first capacitor, a first inductor, a second capacitor and a second inductor; the first capacitor is connected in series between the input end of the first final stage power unit and the output end of the second final stage power unit, the first inductor is connected in series between the first capacitor and the output end of the second final stage power unit, the second capacitor is connected in series between the input end of the second final stage power unit and the output end of the first final stage power unit, and the second inductor is connected in series between the second capacitor and the output end of the first final stage power unit.
  • the output synthesis unit includes a first transformer, a third capacitor, a fourth capacitor and a fifth capacitor;
  • the first transformer comprises a first primary coil and a first secondary coil, wherein a first end of the first primary coil serves as a first input end of the output synthesis unit to be connected to an output end of the first final power unit, and a second end of the first primary coil serves as an output end of the output synthesis unit.
  • the second input end of the output synthesis unit is connected to the output end of the second final power unit, and the first end of the first secondary coil serves as the output end of the output synthesis unit to be connected to the signal output end;
  • a first end of the third capacitor is connected to the middle tap of the first primary coil, and a second end of the third capacitor is grounded;
  • a first end of the fourth capacitor is connected to the middle tap of the first primary coil, and a second end of the fourth capacitor is grounded;
  • a first end of the fifth capacitor is connected to the second end of the first secondary coil, and a second end of the fifth capacitor is grounded.
  • the output synthesis unit further includes a sixth capacitor and a first resistor; the sixth capacitor is connected in parallel between the first end and the second end of the first primary coil, and the first resistor is also connected in parallel between the first end and the second end of the first primary coil.
  • the output synthesis unit further includes a resonant circuit connected to the first end of the first secondary coil.
  • the resonant circuit includes a seventh capacitor and a third inductor; the first end of the seventh capacitor is connected to the first end of the first secondary coil, the first end of the third inductor is connected to the second end of the seventh capacitor, and the second end of the third inductor is grounded.
  • the differential unit includes a second transformer, an eighth capacitor, a ninth capacitor, a tenth capacitor and an eleventh capacitor;
  • the second transformer comprises a second primary coil and a second secondary coil, wherein a first end of the second primary coil serves as an input end of the amplifier stage differential power unit to be connected to an output end of the driver stage power unit;
  • a first end of the eighth capacitor is connected to the first end of the second primary coil, and a second end of the eighth capacitor is grounded;
  • a first end of the ninth capacitor is connected to the second end of the second primary coil, and a second end of the ninth capacitor is grounded;
  • a first end of the tenth capacitor is connected to a second end of the second primary coil, and a second end of the tenth capacitor is grounded;
  • a first end of the eleventh capacitor is connected to a middle tap of the second secondary coil, and a second end of the eleventh capacitor is grounded;
  • An input end of the first final stage power unit is connected to a first end of the second secondary coil, and an input end of the second final stage power unit is connected to a second end of the second secondary coil.
  • the differential unit further includes a second resistor; the second resistor is connected in parallel to the first end and the second end of the second primary coil.
  • the driving stage power unit includes a driving transistor, a driving capacitor and a driving resistor;
  • the base of the driving transistor serves as the input end of the driving stage power unit to be connected to the signal input end, the emitter of the driving transistor is grounded, the collector of the driving transistor serves as the output end of the driving stage power unit to be connected to the input end of the amplifier stage differential power unit, the driving capacitor is connected in series between the base of the driving transistor and the signal input end, the first end of the driving resistor is connected to the first bias circuit, and the second end of the driving resistor is connected to the base of the driving transistor;
  • the circuit structure of the first final-stage power unit is the same as that of the driving-stage power unit; in the first final-stage power unit: the base of the driving transistor serves as the input end of the first final-stage power unit to be connected to the first end of the second secondary coil, the emitter of the driving transistor is grounded, the collector of the driving transistor serves as the output end of the first final-stage power unit to be connected to the first input end of the output synthesis unit, the driving capacitor is connected in series between the base of the driving transistor and the first end of the second secondary coil, the first end of the driving resistor is connected to the second bias circuit, and the second end of the driving resistor is connected to the base of the driving transistor;
  • the circuit structure of the second final-stage power unit is the same as that of the driving-stage power unit; in the second final-stage power unit: the base of the driving transistor serves as the input end of the second final-stage power unit to be connected to the second end of the second secondary coil, the emitter of the driving transistor is grounded, and the collector of the driving transistor serves as the output end of the second final-stage power unit to be connected to the second input end of the output synthesis unit.
  • the driving capacitor is connected in series between the base of the driving transistor and the second end of the second secondary coil, the first end of the driving resistor is connected to the third bias circuit, and the second end of the driving resistor is connected to the base of the driving transistor.
  • the two-stage differential power amplifier further comprises an input matching circuit connected in series between the signal input terminal and the driving stage power unit.
  • the present invention provides a radio frequency power amplifier module, which includes the two-stage differential power amplifier as described above.
  • the two-stage differential power amplifier of the present invention adds the first capacitor between the input end of the first final-stage power unit and the output end of the second final-stage power unit, and adds the second capacitor between the input end of the second final-stage power unit and the output end of the first final-stage power unit, so that the two-way RF differential signal amplified by the first final-stage power unit and the second final-stage power unit can be supplemented to the output synthesis unit of the other way, thereby reducing the influence of its base-collector capacitance on the first final-stage power unit and the second final-stage power unit, thereby improving the circuit gain effect of the two-stage differential power amplifier.
  • the out-of-band signal is attenuated.
  • FIG1 is a circuit diagram of a two-stage differential power amplifier provided by an embodiment of the present invention.
  • An embodiment of the present invention provides a two-stage differential power amplifier 100, which includes a signal input terminal RFin, a driving stage power unit 2, an amplifying stage differential power unit 3, an output synthesis unit 4 and a signal output terminal RFout connected in sequence as shown in FIG. 1 .
  • the driving stage power unit 2 is used to amplify a single-ended signal received by the signal input terminal RFin and output it;
  • the amplifier stage differential power unit 3 is used to receive a single-ended signal amplified by the driving stage power unit 2, and convert it into two differential signals and then amplify them respectively and output them;
  • the output synthesis unit 4 is used to synthesize the two differential signals converted and amplified by the amplifier stage differential power unit 3 into a single-ended signal and output it to the signal output terminal RFout.
  • the amplifier stage differential power unit 3 includes a differential unit 31, a first final stage power unit 32, a second final stage power unit 33, a first capacitor C04, a first inductor L01, a second capacitor CO5 and a second inductor L02; the first capacitor C04 is connected in series between the input end of the first final stage power unit 32 and the output end of the second final stage power unit 33, the first inductor L01 is connected in series between the first capacitor C04 and the output end of the second final stage power unit 33, the second capacitor CO5 is connected in series between the input end of the second final stage power unit 33 and the output end of the first final stage power unit 32, and the second inductor L02 is connected in series between the second capacitor C05 and the output end of the first final stage power unit 32.
  • the driving stage power unit 2 includes a driving transistor (not labeled in the figure), a driving capacitor (not labeled in the figure) and a driving resistor (not labeled in the figure).
  • the base of the driving transistor is used as the input terminal of the driving stage power unit 2 to be connected to the signal input terminal RFin, the emitter of the driving transistor is grounded, and the collector of the driving transistor is used as the output terminal of the driving stage power unit 2 to be connected to the input terminal of the amplifier stage differential power unit 3.
  • the driving capacitor is connected in series between the base of the driving transistor and the signal input terminal RFin, the first end of the driving resistor is connected to the first bias circuit 5, and the second end of the driving resistor is connected to the base of the driving transistor.
  • the amplifier stage differential power unit 3 also includes a first resistor R02 and a second resistor R03; the first resistor R02 is connected in series between the input end of the first final stage power unit 32 and the first capacitor C04, and the second resistor R03 is connected in series between the input end of the second final stage power unit 33 and the second capacitor CO5.
  • the first resistor R02 and the first capacitor C04 can form a first RC series circuit (RC filter, RC network or phase shift circuit), and the second resistor R03 and the second capacitor CO5 can form a second RC series circuit. These two RC series circuits can attenuate out-of-band signals.
  • the differential unit 31 includes a second transformer TF1 , an eighth capacitor C01 , a ninth capacitor C02 , a tenth capacitor C10 , and an eleventh capacitor C03 .
  • the second transformer TF1 includes a second primary coil and a second secondary coil.
  • the first end of the second primary coil serves as the input end of the amplifying stage differential power unit 3 to be connected to the output end of the driving stage power unit 2, that is, the first end of the second primary coil is connected to the collector of the driving transistor in the driving stage power unit 2.
  • a first end of the eighth capacitor C01 is connected to a first end of the second primary coil, and a second end of the eighth capacitor C01 is grounded; a first end of the ninth capacitor C02 is connected to a second end of the second primary coil, and a second end of the ninth capacitor C02 is grounded; a first end of the tenth capacitor C10 is connected to a second end of the second primary coil, and a second end of the tenth capacitor C10 is grounded; a first end of the eleventh capacitor C03 is connected to a middle tap of the second secondary coil, and a second end of the eleventh capacitor C03 is grounded.
  • the second end of the second primary coil is also connected to the first supply voltage VCC1.
  • An input end of the first final stage power unit 32 is connected to a first end of the second secondary coil, and an input end of the second final stage power unit 33 is connected to a second end of the second secondary coil.
  • the differential unit 31 further includes a second resistor R01; the second resistor R01 is connected in parallel to the first end and the second end of the second primary coil.
  • the second resistor R01 can enhance the second variable The isolation between the two balanced ports (the first end and the second end of the second primary coil) of the transformer TF1 is improved.
  • the circuit structure of the first final stage power unit 32 is the same as that of the driving stage power unit 2 ; the circuit structure of the second final stage power unit 33 is also the same as that of the driving stage power unit 2 .
  • the base of the driving transistor serves as the input end of the first final stage power unit 32 to be connected to the first end of the second secondary coil, the emitter of the driving transistor is grounded, the collector of the driving transistor serves as the output end of the first final stage power unit 32 to be connected to the first input end of the output synthesis unit 4, the driving capacitor is connected in series between the base of the driving transistor and the first end of the second secondary coil, the first end of the driving resistor is connected to the second bias circuit 6, and the second end of the driving resistor is connected to the base of the driving transistor.
  • the base of the driving transistor serves as the input end of the second final stage power unit 33 to be connected to the second end of the second secondary coil, the emitter of the driving transistor is grounded, the collector of the driving transistor serves as the output end of the second final stage power unit 33 to be connected to the second input end of the output synthesis unit 4, the driving capacitor is connected in series between the base of the driving transistor and the second end of the second secondary coil, the first end of the driving resistor is connected to the third bias circuit 7, and the second end of the driving resistor is connected to the base of the driving transistor.
  • the output synthesis unit 4 includes a first transformer TF2, a third capacitor CO7, a fourth capacitor C11 and a fifth capacitor C08.
  • the first transformer TF2 includes a first primary coil and a first secondary coil.
  • the first end of the first primary coil serves as the first input end of the output synthesis unit 4 to be connected to the output end of the first final stage power unit 32.
  • the second end of the first primary coil serves as the second input end of the output synthesis unit 4 to be connected to the output end of the second final stage power unit 33.
  • the first end of the first secondary coil serves as the output end of the output synthesis unit 4 to be connected to the signal output end RFout.
  • the center tap of the first primary coil is also connected to the second supply voltage VCC2.
  • the first end of the third capacitor CO7 is connected to the middle tap of the first primary coil, and the second end of the third capacitor CO7 is grounded; the first end of the fourth capacitor C11 is connected to the middle tap of the first primary coil, and the second end of the fourth capacitor C11 is grounded; the first end of the fifth capacitor C08 is connected to the first primary coil. A second end of the primary coil and a second end of the fifth capacitor C08 are grounded.
  • the output synthesis unit 4 further includes a sixth capacitor 06 and a first resistor R02; the sixth capacitor 06 is connected in parallel between the first end and the second end of the first primary coil, and the first resistor R02 is also connected in parallel between the first end and the second end of the first primary coil.
  • a sixth capacitor O6 and a first resistor R02 forming an RC parallel circuit are introduced into two balanced ports of the first transformer TF2 (the first end and the second end of the first primary coil), so that the isolation between the two balanced ports of the first transformer TF2 can be improved.
  • the output synthesis unit 4 also includes a resonant circuit connected to the first end of the first secondary coil; the resonant circuit includes a seventh capacitor C09 and a third inductor L03; the first end of the seventh capacitor C09 is connected to the first end of the first secondary coil, the first end of the third inductor L03 is connected to the second end of the seventh capacitor C09, and the second end of the third inductor L03 is grounded.
  • the second-order filtering of the main frequency can be suppressed, and the impedance of the two balanced ports of the first transformer TF2 can be adjusted through the seventh capacitor C09.
  • the two-stage differential power amplifier 100 further includes an input matching circuit 1 connected in series between the signal input terminal RFin and the input terminal of the driving stage power unit 2 .
  • the principle of improving the circuit gain effect of the two-stage differential power amplifier 100 is as follows: a first capacitor C04 and a second capacitor CO5 (cross-coupling capacitor) are introduced between the first final-stage power unit 32 and the second final-stage power unit 33, so that two differential signals with completely opposite phases after being amplified by the first final-stage power unit 32 and the second final-stage power unit 33 can be compensated to the output synthesis unit 4 of the other path, that is, the cross-coupling capacitor introduces the effect of negative capacitance relative to the base nodes corresponding to the first final-stage power unit 32 and the second final-stage power unit 33, thereby neutralizing the influence of the base-collector capacitance (Cbc).
  • a first capacitor C04 and a second capacitor CO5 cross-coupling capacitor
  • first inductor L01 and the first capacitor C04 form a first LC series circuit (LC resonance or LC resonant circuit)
  • second inductor L02 and the second capacitor C05 form a second LC series circuit, so that the two differential signals output by the first final stage power unit 32 and the second final stage power unit 33 can be attenuated, that is, the out-of-band signals can be attenuated.
  • connections are all electrical connections or electrical connections, that is, the way two devices or multiple devices are connected is all electrical connection or electrical connection.
  • the two-stage differential power amplifier 100 of the present invention adds a first capacitor C04 between the input end of the first final-stage power unit 32 and the output end of the second final-stage power unit 33, and adds a second capacitor CO5 between the input end of the second final-stage power unit 33 and the output end of the first final-stage power unit 32, so that the two-way RF differential signal amplified by the first final-stage power unit 32 and the second final-stage power unit 33 can be supplemented to the output synthesis unit 4 of the other way, thereby reducing the influence of the base-collector capacitance on the first final-stage power unit 32 and the second final-stage power unit 33, thereby improving the circuit gain effect of the two-stage differential power amplifier 100.
  • a first inductor L01 forming an LC series circuit with the first capacitor C04 and a second inductor L02 forming an LC series circuit with the second capacitor CO5 the out-of-band signal is attenuated.
  • the present invention further provides another embodiment, a radio frequency power amplifier module, which includes the two-stage differential power amplifier 100 in the above embodiment.
  • the RF power amplifier module in this embodiment includes the two-stage differential power amplifier 100 in the above embodiment, it can also achieve the technical effect achieved by the two-stage differential power amplifier 100 in the above embodiment, which will not be elaborated here.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

La présente divulgation concerne un amplificateur de puissance différentielle à deux étages (100) et un module d'amplification de puissance radiofréquence. L'amplificateur de puissance différentielle à deux étages (100) comprend une extrémité d'entrée de signal, une unité d'alimentation d'étage d'attaque (2), une unité d'alimentation différentielle d'étage d'amplification (3), une unité de synthèse de sortie (4) et une extrémité de sortie de signal, qui sont connectées en séquence ; l'unité d'alimentation différentielle d'étage d'amplification (3) comprend une unité différentielle (31), une première unité d'alimentation d'étage final (32), une deuxième unité d'alimentation d'étage final (33), un premier condensateur, un premier inducteur, un deuxième condensateur et un deuxième inducteur. L'amplificateur de puissance différentielle à deux étages décrit (100) peut réduire l'influence d'un condensateur de collecteur de base sur la première unité d'alimentation d'étage final (32) et la deuxième unité d'alimentation d'étage final (33), ce qui permet d'améliorer l'effet de gain de circuit de l'amplificateur de puissance différentielle à deux étages (100) ; en outre, l'amplificateur de puissance différentielle à deux étages joue également un rôle dans l'atténuation de signaux hors bande.
PCT/CN2023/115067 2022-10-26 2023-08-25 Amplificateur de puissance différentielle à deux étages et module d'amplification de puissance radiofréquence WO2024087852A1 (fr)

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CN202211321799.5A CN115567015A (zh) 2022-10-26 2022-10-26 两级差分功率放大器及射频功放模组
CN202211321799.5 2022-10-26

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115567015A (zh) * 2022-10-26 2023-01-03 深圳飞骧科技股份有限公司 两级差分功率放大器及射频功放模组
CN115580244A (zh) * 2022-10-26 2023-01-06 深圳飞骧科技股份有限公司 差分功率放大电路及射频芯片

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CN216390932U (zh) * 2021-09-26 2022-04-26 深圳飞骧科技股份有限公司 Mmic射频功率放大器
CN115567015A (zh) * 2022-10-26 2023-01-03 深圳飞骧科技股份有限公司 两级差分功率放大器及射频功放模组

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CN106533374A (zh) * 2016-09-20 2017-03-22 锐迪科微电子（上海）有限公司 一种多频gsm射频功率放大器
US20210391835A1 (en) * 2020-06-10 2021-12-16 Murata Manufacturing Co., Ltd. Power amplifier circuit
CN216390932U (zh) * 2021-09-26 2022-04-26 深圳飞骧科技股份有限公司 Mmic射频功率放大器
CN114172468A (zh) * 2021-11-24 2022-03-11 深圳飞骧科技股份有限公司 射频功率放大器及短报文通信系统
CN115567015A (zh) * 2022-10-26 2023-01-03 深圳飞骧科技股份有限公司 两级差分功率放大器及射频功放模组

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